AS12303 Magyarorszagi Internet Szolgaltatok Tanacsa Tudomanyos Egyesulet

Hungary ISZT-AS RIPE 1 IPv4 prefix 1 IPv6 prefix

IPv4 addresses

1,024

IPv6 /48 networks

256

RPKI

0 valid2 no ROA

Peers and downstreams

Holder

AS name: ISZT-AS
Description: ISZT Nonprofit Kft. Blathy Otto utca 9. H-1089 Budapest Hungary
Organisation: Magyarorszagi Internet Szolgaltatok Tanacsa Tudomanyos Egyesulet
Registered in: Budapest, Hungary
Abuse contact: abuse@nic.hu
Assigned: 2005-06-13
Registered: 2005-06-14
Record last changed: 2026-06-22 11:18 UTC

5.28.0.0/22

Upstream graph

Upstreams and their upstreams, from BGP paths

Network health

Grade C · 65/100

fail	Prefixes covered by valid ROAs 0 of 2 announced prefixes are RPKI valid, 2 have no ROA.	0/25
pass	No RPKI invalid announcements None of the announcements is RPKI invalid.	10/10
pass	Announces IPv6 1 IPv6 prefix.	15/15
pass	More than one upstream 2 upstreams seen in BGP.	10/10
pass	Working abuse contact abuse@nic.hu is published.	15/15
fail	Publishes a geofeed No geofeed found. Without one, location databases have to guess.	0/10
pass	No prefixes smaller than /24 or /48 All prefixes are /24 (IPv4) or /48 (IPv6) or larger.	10/10
pass	Registry record maintained Last changed 2026-06-22.	5/5

Built from the announced prefixes, RPKI, the registry record and geofeeds. Checks without data are not counted. Also in the API.

Show this on your website

HTML

<a href="https://ip-fd.net/asn/12303"><img src="https://ip-fd.net/badge/asn/12303/health.svg" alt="AS12303 network health on IP-FD.net"></a>

Markdown

[![AS12303 network health](https://ip-fd.net/badge/asn/12303/health.svg)](https://ip-fd.net/asn/12303)

Use rpki.svg instead of health.svg for the RPKI badge.

Routing changes

Last 30 days

2026-10-04 10:37 UTC	Relationship changed	AS6663	upstream to peer
2026-10-04 10:37 UTC	Relationship changed	AS47692	upstream to peer
2026-10-04 10:37 UTC	Relationship changed	AS33891	upstream to peer
2026-10-04 10:37 UTC	Relationship changed	AS21215	upstream to peer
2026-10-04 10:37 UTC	Relationship changed	AS15958	upstream to peer

WHOIS

aut-num:        AS12303
as-name:        ISZT-AS
descr:          ISZT Nonprofit Kft.
descr:          Blathy Otto utca 9.
descr:          H-1089 Budapest
descr:          Hungary
org:            ORG-MIST1-RIPE
remarks:        Upstreams
remarks:        ---------
remarks:        Services
remarks:        --------
member-of:      AS3320:AS-AUTH-PILOT-BLACKHOLE-FROM-AS5483
admin-c:        JZ1170-RIPE
tech-c:         JZ1170-RIPE
status:         ASSIGNED
mnt-by:         RIPE-NCC-END-MNT
mnt-by:         HU-NIC-MNT
mnt-by:         AS5507-MNT
created:        2005-06-14T09:03:41Z
last-modified:  2026-06-22T11:18:49Z
source:         RIPE
% 33 routing policy lines (import/export) not shown

Routing data

Updated just now

Registry record

Fetched just now from RIPE

Prefixes and neighbours come from the RIPE RIS route collectors. Data older than 5 minutes is refreshed when this page is opened.

API

curl -H "X-API-Key: YOUR_KEY" https://ip-fd.net/api/v1/asn/12303

const res = await fetch('https://ip-fd.net/api/v1/asn/12303', {
  headers: { 'X-API-Key': 'YOUR_KEY' }
});
const data = await res.json();
console.log(data);

import requests

r = requests.get('https://ip-fd.net/api/v1/asn/12303', headers={'X-API-Key': 'YOUR_KEY'}, timeout=10)
r.raise_for_status()
print(r.json())

<?php
$ch = curl_init('https://ip-fd.net/api/v1/asn/12303');
curl_setopt($ch, CURLOPT_HTTPHEADER, ['X-API-Key: YOUR_KEY']);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$data = json_decode(curl_exec($ch), true);
print_r($data);

req, _ := http.NewRequest("GET", "https://ip-fd.net/api/v1/asn/12303", nil)
req.Header.Set("X-API-Key", "YOUR_KEY")
res, err := http.DefaultClient.Do(req)
if err != nil {
    log.Fatal(err)
}
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))

Works without a key at a lower rate. Get a free key.

AS6939	Hurricane Electric LLC HURRICANE
AS62214	Rackforest Zrt. RACKFOREST-AS

AS6663	Euroweb Romania S.R.L. TTI-NET
AS15958	CETIN Ltd. Belgrade CETIN_doo_AS
AS21215	UNITED GROUP NETWORK INFRASTRUCTURE d.o.o. Beograd UGNI
AS33891	Core-Backbone GmbH CORE-BACKBONE
AS40994	Hohl IT e.U. Alwyzon
AS47692	Nessus GmbH NESSUS
AS49544	i3D.net B.V i3Dnet